【声学】隔音板

Broadcast: May 10, 2003 By Cynthia Kirk This is the VOA Special English program, In the News. Investigators say they now believe they know what caused the American space shuttle Columbia to break apar

发表于:2018-12-07 / 阅读(71) / 评论(0) 分类 VOA2003(上)-科技导航

When Pablo Panda Sandoval made history with 3 home runs in game one of the world series his head was probably buzzing. But when batters in chilly Detroit had the ball not quite right in the next couple of the nets, it will be their hands that buzzing

发表于:2018-12-24 / 阅读(76) / 评论(0) 分类 Scientific American(十)月

This is Scientific American's 60-second Science. I'm Steve Mirsky. Got a minute? Can you name those notes? Probably not. Perhaps one in ten thousand speakers of European languages has perfect pitch - the ability to recognize a note without having hea

发表于:2018-12-24 / 阅读(77) / 评论(0) 分类 Scientific American(五)月

This is Scientific American's 60-second Science. I'm Karen Hopkin. If you ever got picked on in the schoolyard, you might have wished for some sort of superpower, like unbeatable speed or maybe just the ability to completely disappear. Now scientists

发表于:2018-12-24 / 阅读(79) / 评论(0) 分类 Scientific American(五)月

Scientists analyzed around 2,500 of those calls, and found that the second part (sound) is nearly identical in pitch every time from each whale: 16 hertz, or four octaves below middle C. And the slight variations in frequency that do exist are only a

发表于:2019-01-02 / 阅读(112) / 评论(0) 分类 60秒科学

Hybrid cars are good for the environment. But scientists say that they might be bad for pedestrians. Because hybrids are so quiet, it can be hard for walkers to hear them until its too late. Listen to this. [quiet car sound] Thats a Toyota Prius mov

发表于:2019-01-02 / 阅读(129) / 评论(0) 分类 60秒科学

Can you name those notes? Probably notperhaps one in 10,000 speakers of European languages has perfect pitch, the ability to recognize a note without having heard any reference note first. But theres a much better chance you could successfully name

发表于:2019-01-02 / 阅读(107) / 评论(0) 分类 60秒科学

If you ever got picked on in the schoolyard, you might have wished for some sort of superpower: like unbeatable speed or maybe just the ability to completely disappear. Now scientists at the College of Wooster in Ohio say that you might have had a s

发表于:2019-01-02 / 阅读(128) / 评论(0) 分类 60秒科学

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Every year, scores of manatees are killed by boats in Floridas waters. Their plight is an ecological concern. And everyone from marine biologists to Marg

发表于:2019-01-08 / 阅读(80) / 评论(0) 分类 Scientific American(十一)月

This is Scientific American's 60-second Science. I'm Karen Hopkin. This will just take a minute. Hybrid cars are good for the environment, but scientists say that they might be bad for pedestrians. Because hybrids are so quiet that can be hard for wa

发表于:2019-01-08 / 阅读(88) / 评论(0) 分类 Scientific American(五)月

We humans are pretty good at communicating with sounds other than words. But how much of this is hard-wired, and how much do we pick up from others? To find out, researchers recorded the nonverbal sounds of people born deaf, as they responded to a ra

发表于:2019-01-08 / 阅读(75) / 评论(0) 分类 Scientific American(十一)月

Blue whales off the California coast make calls that, sped up 10 times, sound like (sound of two-part call). The original is a wall-rattling frequency too low for us to hear. Scientists analyzed around 2,500 of those calls, and found that the second

发表于:2019-01-08 / 阅读(62) / 评论(0) 分类 Scientific American(八)月

Country Music Ladies Put Men in Their Place American country music lyrics often describe women as they might appear in mens dreams. This is especially true of songs by many male artists. But the songs by Maddie Marlow and Tae Dye are different. The t

发表于:2019-01-12 / 阅读(83) / 评论(0) 分类 2015年VOA慢速英语(九)月

Boston Symphony Makes Music in Mountains When Serge Koussevitzy, the Russian-born conductor of the Boston Symphony Orchestra, opened Tanglewood in 1937, he chose an all-Beethoven program, including the Pastorale Symphony. When conductor Christoph von

发表于:2019-01-13 / 阅读(67) / 评论(0) 分类 VOA标准英语2012年(七月)

By Alisha Ryu Nairobi 18 November 2009 A U.S.-flagged container ship which was hijacked by Somali pirates seven months ago has been attacked again off the coast of Somalia. Pirates were unsuccessful in their second attempt to hijack the Maersk Alaba

发表于:2019-01-14 / 阅读(98) / 评论(0) 分类 VOA标准英语2009年(十一月)

The Tiangong-2 space lab, though adopting the structure of Tiangong-1 without too many changes in appearance, has been designed to function much stronger than its predecessor. Zhu Congpeng, chief designer of the lab, says they've focused on a variety

发表于:2019-01-19 / 阅读(84) / 评论(0) 分类 2016CRI中国国际广播电台

SAN FRANCISCO, June 23 (Xinhua) -- Facebook announced Thursday that Netflix CEO and Chairman Reed Hastings has joined the social network company's board of directors. Hastings, who successfully managed Netflix through an IPO in 2002, is expected to p

发表于:2019-02-03 / 阅读(104) / 评论(0) 分类 英语新闻

通知与确认 Acknowledgments Confirmations 通知对方接到来信Acknowledging receipt of letters1. Dear Mr/Ms,Thank you for your letter No. A-3 of 6th May, offeringus 6 UI-4 Viewdatas. We have passed it on to ourTechnical Department for their c

发表于:2019-02-06 / 阅读(125) / 评论(0) 分类 实用英语

下雨天了怎么办 Were it to me for how to handle the occasion being immersing in rainy days? ? 我好想你 Overwhelmingly extreme yearning do I pour upon you. ? 不敢打给你 Barely courageous off tinkling you. ? 我找不到原因 Unprovoked

发表于:2019-02-09 / 阅读(118) / 评论(0) 分类 英语口语

Many houses in New Zealand are cold. Our traditional wooden house had no insulation. If you live in a house like that, you are paying for heat to escape from the ceiling, walls and under the floor. Insulation is made from material like wool or fibreg

发表于:2019-02-18 / 阅读(92) / 评论(0) 分类 新西兰英语
学英语单词
98
acidity
aerosol food
afghanistani
alloy irons
antibiolumphin
ashpan blower valve
automatic assembly
avi cable
bakeout degassing clamp
birchleaf pear
body-curved disease
bodywood
bottom relief map
Bozeman's position
bridge cloth
bullock blocks
bushing electric
call accepted signal
chondriomere
Cirbanal
close set
color constants
comebackers
commodity wastage
correptions
courier bag
Cunaxa
departmentation by process or equipment
electronic fire-control equipment
element name
encoded fields
end of astronomical evening twilight
engine pod
ensampling
epss network
featurism
ferret distemper virus
fiber-map
full electronic switching
gallucci
general-purpose diagnostic program
geographical north
geospatial engineering
glowfly
haberse
hardware stage
hexagonal mirror
hot penetration construction
Hudsonian godwit
Immobilon
interstitial distance (mather 1936)
investigation on audience
Krasnaya Polyana
layer-wound solenoid
leather loader
limestone neutralization treatment
maximal tubular excretory capacity
melanedema
natural rate of unemployment
nerr
non-coplanar transfer
norvasc
nosedives
OMR (optical mark reader)
optically positive
over bridges
partner with
Pashtunwali
patung series
paving stone degeneration of retina
permanent magnet moving coil meter
pivoted bucket carrier
plantar spaces
plunged into
prince fumimaro konoyes
prodan
psychoanalytical theory
Pterocles
pyrophoric lead
raw material of woodcharcaol
roller chamfer
schwab
Scythians
sequentially-lobed radar
signal smoke
signe de peau d'orange
slugft
So it goes
sp vol
spin space
Stackelberg decision theory
swansea
tandem electrostatic generator
terry swatch
the leaflets of the trifoliolate leaves
topochemical control
variable acceptance sampling
viscosity model
Warenford
weighing-appliance
zeomorphis